Display device

Abstract

A display device has a display surface located at a front surface and an auxiliary sensing surface located at a side surface. The display device includes a display panel including a display area and a non-display area. An input sensing unit is on the display panel and an auxiliary sensing unit is on the auxiliary sensing surface. The auxiliary sensing unit is configured to sense a fingerprint or palm print of a user and is formed in the same layer as any one of the display panel and the input sensing unit.

What is claimed is: 
     
       1. A display device having a display surface located at a front surface and an auxiliary sensing surface located at a side surface, the display device comprising:
 a display panel comprising a display area and a non-display area; 
 an input sensing unit on the display panel; and 
 an auxiliary sensing unit at the auxiliary sensing surface, the auxiliary sensing unit being configured to sense at least one of a fingerprint or a palm print of a user, 
 wherein the auxiliary sensing unit is formed in the same layer as the display panel, and 
 wherein the display panel further comprises a display unit comprising display pixels at the display surface and the auxiliary sensing unit comprising auxiliary pixels at the auxiliary sensing surface; 
 wherein the display panel further comprises: 
 a base layer; 
 a circuit element layer on the base layer; 
 a display element layer on the circuit element layer; 
 an auxiliary sensing element layer on the circuit element layer and spaced apart from the display element layer; and 
 a thin film encapsulation layer that encapsulates the display element layer and the auxiliary sensing element layer. 
 
     
     
       2. The display device of  claim 1 , wherein the display element layer comprises light emitting devices of the display pixels, and
 wherein the auxiliary sensing element layer comprises auxiliary sensing electrodes of the auxiliary pixels. 
 
     
     
       3. The display device of  claim 2 , wherein the circuit element layer comprises transistors from the display pixels and the auxiliary pixels. 
     
     
       4. The display device of  claim 3 , wherein the display element layer is located in the display area. 
     
     
       5. A display device having a display surface located at a front surface and an auxiliary sensing surface located at a side surface, the display device comprising:
 a display panel comprising a display area and a non-display area; 
 an input sensing unit on the display panel; and 
 an auxiliary sensing unit at the auxiliary sensing surface, the auxiliary sensing unit being configured to sense at least one of a fingerprint or a palm print of a user, 
 wherein the auxiliary sensing unit is formed in the same layer as the display panel, 
 wherein the display panel further comprises a display unit comprising display pixels at the display surface and the auxiliary sensing unit comprising auxiliary pixels at the auxiliary sensing surface, 
 wherein the display panel further comprises a driving circuit configured to drive the display pixels and the auxiliary pixels, and 
 wherein the driving circuit sequentially drives the display pixels and the auxiliary pixels for each horizontal line. 
 
     
     
       6. The display device of  claim 5 , wherein the driving circuit sequentially outputs scan signals to scan lines, and
 the display pixels and the auxiliary pixels are respectively connected to the same scan lines for each horizontal line. 
 
     
     
       7. The display device of  claim 6 , wherein the driving circuit is between the display unit and the auxiliary sensing unit. 
     
     
       8. A display device having a display surface located at a front surface and an auxiliary sensing surface located at a side surface, the display device comprising:
 a display panel comprising a display area and a non-display area; 
 an input sensing unit on the display panel; and 
 an auxiliary sensing unit at the auxiliary sensing surface, the auxiliary sensing unit being configured to sense at least one of a fingerprint or a palm print of a user, 
 wherein the auxiliary sensing unit is formed in the same layer as any one of the display panel and the input sensing unit, the same layer having a first portion parallel to the front surface and a second portion parallel to the side surface, the first portion comprising any one of the display panel and the input sensing unit and the second portion comprising the auxiliary sensing unit, 
 wherein the display panel further comprises a display unit comprising display pixels at the display surface and the auxiliary sensing unit comprising auxiliary pixels at the auxiliary sensing surface, 
 wherein the auxiliary sensing unit is formed in the same layer as the display panel, 
 wherein an auxiliary pixel connected to an ith (i is an integer of 2 or more) scan line and an auxiliary output line among the auxiliary pixel comprises: 
 an auxiliary sensing electrode; 
 a first transistor having a gate electrode connected to the auxiliary sensing electrode, the first transistor controlling a current output through the auxiliary output line; 
 a second transistor having a gate electrode connected to the ith scan line, the second transistor being connected between an auxiliary power line and the first transistor; 
 a third transistor having a gate electrode connected to an (i-1)th scan line, the third transistor being connected between the auxiliary power line and the auxiliary sensing electrode; and 
 a capacitor electrode forming a first capacitor with the auxiliary sensing electrode, the capacitor electrode being connected to the ith scan line. 
 
     
     
       9. The display device of  claim 8 , wherein the auxiliary sensing electrode forms a second capacitor with a finger of a user when a touch occurs. 
     
     
       10. The display device of  claim 9 , wherein the auxiliary sensing unit recognizes the fingerprint or the palm print of the user, according to a change in capacitance of the second capacitor, corresponding to the touch.